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What Is Node.js?
Node.js runs JavaScript on the server to build backend apps.
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AiTechWorlds
AiTechWorlds
Node.js lets you run JavaScript on the server to build fast, scalable backend applications. This visual guide covers the event loop, non-blocking I/O, npm, modules, Express, and how Node handles many requests efficiently.
Node.js runs JavaScript on the server to build backend apps.
One language for frontend and backend, fast and scalable.
Node handles many requests on a single thread without blocking.
Slow operations run in the background while code continues.
npm installs and manages JavaScript packages.
Split code into reusable modules with import/export.
Node can serve requests with the built-in http module.
Express is a minimal framework for building APIs and apps.
Routes handle URLs; middleware runs between request and response.
Node easily parses and returns JSON for APIs.
Write clean asynchronous code for I/O.
Node works with SQL and NoSQL databases.
Store config and secrets outside code.
Catch and respond to errors gracefully.
Automate build, test, and run tasks.
APIs, real-time apps, and I/O-heavy services.
Heavy CPU-bound work suits other runtimes better.
Newer runtimes improve speed and tooling.
Validate input and keep dependencies updated.
Full-stack JavaScript and a huge ecosystem.
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